java.sql.sqlException: Network error IOException: Connection refused: connect
     String url= "jdbc:jtds:sqlserver://127.0.0.1/sfts";
String id= "sfts";
String pass = "sfts";
try{
     Class.forName("net.sourceforge.jtds.jdbc.Driver");
     con = java.sql.DriverManager.getConnection(url,id,pass);
    }catch(Exception e){
                out.println(e);
     }

在运行此代码时,它会显示错误

java.sql.sqlException: Network error IOException: Connection refused: connect

TCP / IP已启用,端口号设置为1433.但仍然显示此错误..现在该怎么办？